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A Harmonic Traceability Method Based on Dynamic Programming Time Series Similarity Algorithm

A technology of time series and harmonic traceability, applied in computing, computer components, instruments, etc., can solve the problems of inaccurate harmonic traceability and responsibility allocation, cumbersome traceability methods, etc.

Active Publication Date: 2022-06-28
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID NINGXIA ELECTRIC POWER COMPANY +1
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Problems solved by technology

[0003] However, most of the existing methods are based on short-term measured instantaneous data, but harmonics are long-term steady-state quantities. Harmonic traceability and responsibility allocation through short-term instantaneous data measurement are not accurate enough, and the existing traceability methods are relatively cumbersome.

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  • A Harmonic Traceability Method Based on Dynamic Programming Time Series Similarity Algorithm
  • A Harmonic Traceability Method Based on Dynamic Programming Time Series Similarity Algorithm

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Embodiment Construction

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments.

[0027] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inside", " The orientation or positional relationship indicated by "outside" is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, so as to The specific orientation configuration and operation are therefore not to be construed as limitations of...

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Abstract

The present invention belongs to the field of electric power technology, in particular, a harmonic source tracing method based on a dynamic programming time series similarity algorithm. Aiming at the problem of poor accuracy, the following scheme is proposed, including the following steps: S1: extract a certain time in a certain day and a method in the system All harmonic data at this time every day; S2: Extract the same time period of the day and all unit time power consumption in the system at this time every day; S3: Process all harmonic data and power consumption per unit time at a certain time on a certain day to form Change curve; S4: weighted average of all harmonic data and power consumption per unit time at a certain time each day to form a change curve; S5: respectively subtract the data of a certain day from the weighted average of harmonic data and power consumption per unit time , get the absolute value and then calculate the average value; S6: use the sequence similarity algorithm to calculate and solve, and trace the source of harmonics according to the calculated value. The present invention monitors and judges the harmonic data more comprehensively and accurately, and the judgment method is simple and effective.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a harmonic source tracing method based on a dynamic programming time series similarity algorithm. Background technique [0002] More and more power electronic loads are connected to the power grid, which makes the harmonic situation in the power grid more complicated, affects the normal operation of the load, and even causes damage to power equipment or power outages in severe cases. In the actual power system, a bus is often connected to multiple users that emit harmonics. The harmonics among these users affect each other. How to accurately locate the harmonic source according to the existing data is the basis for quantitatively dividing the responsibility for harmonics, and it is also the effective control of harmonics. , the premise of ensuring the safe and efficient operation of the power grid and users. At present, there are two types of harmonic traceability method...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/62G01R23/16
CPCG01R23/16G06F18/22
Inventor 李宏强张爽任勇郭欣然
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID NINGXIA ELECTRIC POWER COMPANY
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